The Castellano is a river in Italy. Its source is in the

Monti della Laga Monti della Laga is a mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form ...

mountains near the border between the

province of Teramo The province of Teramo (; Neapolitan language, Abruzzese: ') is a provinces of Italy, province in the Abruzzo region of Italy. Its capital is the city of Teramo. The province has an area of , a population of 313,029 (2012), and is subdivided into ...

and the

province of Rieti The province of Rieti () is a Provinces of Italy, province in the Lazio region of Italy. Its capital is the city of Rieti. Established in 1927, it has an area of with a total population of 157,887 people as of 2017. There are 73 ''comuni'' (: '' ...

north of Monte Gorzano. It flows northeast through the mountains in the province of Teramo and eventually forms the border between the province of Teramo and the

province of Ascoli Piceno The province of Ascoli Piceno () is a province in the Marche region of Italy. Its capital is the city of Ascoli Piceno, and the province is bordered by the Adriatic Sea to the east, the province of Fermo to the north, and it faces the regions ...

. The river flows west of Monte dei Fiori before entering the province of Ascoli Piceno. The river joins the Tronto at

Ascoli Piceno Ascoli Piceno (; ; ) is a (municipality) and capital of the province of Ascoli Piceno, in the Italy, Italian region of Marche. Geography The town lies at the confluence of the Tronto, River Tronto and the small Castellano (river), River Castell ...

References

Rivers of the Province of Ascoli Piceno Rivers of the Province of Teramo Rivers of Italy Adriatic Italian coast basins {{Italy-river-stub